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Finding the Fourth Proportional to 929.55, 1,282.90 and 575.58

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Solution

The fourth proportional to 929.55, 1,282.90 and 575.58 is: 794.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    929.55 : 1,282.90 = 575.58 : x
  2. Step 2: Convert to fraction form
    929.55/1,282.90 = 575.58/x
  3. Step 3: Cross multiply
    929.55x = 1,282.90 × 575.58
  4. Step 4: Simplify right side
    929.55x = 738,411.58
  5. Step 5: Solve for x
    x = 738,411.58/929.55
  6. Step 6: Final answer
    x = 794.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.